Waving one's clenched fists around in the air (usually done while pissed off) while screaming and yelling at someone or something, thus appearing to be an angry monkey.
To write a story on a web site (the more respectable and prominent the better) that is complete and abject bullshit. From a famous incident involving Slate magazine where a writer wrote a story positing a sport involving fishing rods, oranges and simians, and (surprise!) it all turned out to be fabricated.
When a guy is so old that his balls hang low enough to drag on the ground like a monkey whose knuckles are just dragging behind him as he walks. Another phrase for Old Balls